AvePoint Introduces Backup for Office 365 Groups (Well, Outlook Groups)
AvePoint Introduces Backup for Office 365 Groups (Well, Outlook Groups)
AvePoint Introduces Backup for Office 365 Groups (Well, Outlook Groups)
http://icansharepoint.com/restoration-options-sharepoint-online/
http://blog.fpweb.net/managed-sharepoint-backup/
https://www.veeam.com/blog/how-backup-office-365-email.html
http://spanning.com/products/office365-backup/
SkyKick Cloud Backup (for Office 365)